Composite base assembly for a disc spindle motor and actuator assembly

Abstract

A composite base for a disc spindle motor and an actuator spindle assembly including disc spindle portion, an actuator spindle portion and a flange portion. The composite base includes a disc hub portion and an actuator hub portion. The composite base is assembled to a base chassis of a disc drive to form the disc spindle motor assembly and the actuator spindle assembly of the data storage device.

What is claimed is:  
     
         1 . A composite assembly component for assembly to a base chassis of a data storage device comprising: 
 a composite base including a disc spindle portion, an actuator spindle portion and a flange portion;    a disc hub portion formed on the disc spindle portion of the composite base; and    an actuator hub portion formed on the actuator spindle portion of the composite base.    
     
     
         2 . The composite assembly component of  claim 1  wherein the flange portion of the composite base includes a plurality of fastener openings to assembly to the base chassis of the data storage device.  
     
     
         3 . The composite assembly component of  claim 1  wherein the disc hub portion includes a stationary spindle shaft.  
     
     
         4 . The composite assembly component of  claim 3  wherein the disc hub portion includes a shoulder portion having an opening and the stationary spindle shaft is disposed therein.  
     
     
         5 . The composite assembly component of  claim 1  wherein the actuator hub portion includes a stationary sleeve having a sleeve channel therein.  
     
     
         6 . The composite assembly component of  claim 1  wherein the disc hub portion includes a stationary shaft and further comprising: 
 a rotating disc spindle portion including a rim to support at least one disc; and  
 a bearing assembly rotationally coupling the rotating disc spindle portion to the stationary shaft.  
 
     
     
         7 . The composite assembly component of  claim 6  wherein the actuator hub portion includes a stationary sleeve having a sleeve channel and comprising: 
 a rotating actuator spindle including a spindle shaft disposed in the sleeve channel; and  
 a bearing assembly rotationally coupling the rotating actuator spindle relative to the stationary sleeve of the actuator hub portion.  
 
     
     
         8 . The composite assembly component of  claim 6  wherein the disc hub portion includes an energizable coil and the rotating disc spindle portion includes a magnet.  
     
     
         9 . The composite assembly component of  claim 6  wherein the rotating disc spindle portion includes at least one disc supported thereby.  
     
     
         10 . The composite assembly component of  claim 7  wherein the rotating actuator spindle includes at least one actuator arm coupled thereto.  
     
     
         11 . A data storage device comprising: 
 a spindle motor assembly to rotationally support at least one disc;    an actuator spindle assembly to movably support at least one head to read data from or write data to the at least one disc; and    means for assembling the spindle motor assembly and the actuator spindle assembly to a base chassis of the data storage device.    
     
     
         12 . The data storage device of  claim 11  wherein the means for assembling the spindle motor assembly and the actuator spindle assembly to the base chassis includes fastener openings on a flange portion of a composite base for the spindle motor assembly and the actuator spindle assembly.  
     
     
         13 . A method for assembling components of a data storage device comprising the steps of: 
 providing a composite base having a disc hub portion and an actuator hub portion;    assembling a rotating actuator spindle to the actuator hub portion at an actuator assembly site;    transferring the composite base to another site; and    assembling the composite base to a base chassis of the data storage device.    
     
     
         14 . The method of  claim 13  and further comprising the step of: 
 assembling a rotating disc spindle to the disc hub portion.  
 
     
     
         15 . The method of  claim 14  and further comprising the step of: 
 assembling discs on the disc spindle portion after assembling the composite base on the base chassis of the data storage device.  
 
     
     
         16 . The method of  claim 13  and further comprising the step of: 
 assembling an actuator having at least one actuator arm having a head coupled thereto to the rotating actuator spindle.  
 
     
     
         17 . The method of  claim 13  wherein the step assembling the composite base to the base chassis comprises the step of: 
 fastening the composite base to the base chassis via fastener openings.  
 
     
     
         18 . The method of  claim 14  wherein the disc hub portion includes a stationary spindle shaft and the step of assembling the disc spindle to the disc hub portion comprises steps of: 
 assembling an energizable coil relative to the disc hub portion and a magnet relative to the disc spindle; and  
 assembling the disc spindle and a bearing assembly about the stationary spindle shaft to rotationally couple the disc spindle to the disc hub portion.  
 
     
     
         19 . The method of  claim 13  wherein the actuator hub portion includes a stationary sleeve having a sleeve channel and the actuator spindle includes an actuator spindle shaft and the step of assembling the actuator spindle to the actuator hub portion comprises: 
 assembling the actuator spindle shaft and a bearing assembly in the stationary sleeve to rotationally couple the actuator spindle shaft to the actuator hub portion.